Parents need to know that 21 Jump Street is basically Law & Order for teens, and much more serious than the 2012 theatrical release of the same name. Battle lines are drawn clearly: The show's police officers are on the side of good, the criminals on the side of bad. There is very little moral ambiguity; it is easily evident who viewers are supposed to root for. This is a police procedural show, so there is a "crime of the week" on each episode; parents may be concerned about some of the crimes spotlighted, such as one episode where a young baseball player is menaced by villains out to murder him, as well as one where one of the show's officers is named in a paternity suit leveled by a high-schooler. Many kids will find the dated fashions, music, and expressions hilarious; parents may find themselves explaining outdated slang.